On 08/18/2016 04:54 PM, william.c.roberts@xxxxxxxxx wrote: > From: William Roberts <william.c.roberts@xxxxxxxxx> > > The usage patterns between these structures seem similair > to role_val_to_struct usages. Calloc these up to prevent > any unitialized usages. > > Signed-off-by: William Roberts <william.c.roberts@xxxxxxxxx> > --- > libsepol/src/mls.c | 2 +- > libsepol/src/policydb.c | 6 +++--- > libsepol/src/users.c | 9 ++++++++- > 3 files changed, 12 insertions(+), 5 deletions(-) > > diff --git a/libsepol/src/mls.c b/libsepol/src/mls.c > index 2dc5f2b..8047d91 100644 > --- a/libsepol/src/mls.c > +++ b/libsepol/src/mls.c > @@ -312,7 +312,7 @@ int mls_context_isvalid(const policydb_t * p, const context_struct_t * c) > if (!c->user || c->user > p->p_users.nprim) > return 0; > usrdatum = p->user_val_to_struct[c->user - 1]; > - if (!mls_range_contains(usrdatum->exp_range, c->range)) > + if (!usrdatum || !mls_range_contains(usrdatum->exp_range, c->range)) > return 0; /* user may not be associated with range */ > > return 1; > diff --git a/libsepol/src/policydb.c b/libsepol/src/policydb.c > index c225ac6..5f888d3 100644 > --- a/libsepol/src/policydb.c > +++ b/libsepol/src/policydb.c > @@ -1074,7 +1074,7 @@ int policydb_index_others(sepol_handle_t * handle, > > free(p->user_val_to_struct); > p->user_val_to_struct = (user_datum_t **) > - malloc(p->p_users.nprim * sizeof(user_datum_t *)); > + calloc(p->p_users.nprim, sizeof(user_datum_t *)); > if (!p->user_val_to_struct) > return -1; > > @@ -4006,12 +4006,12 @@ int policydb_reindex_users(policydb_t * p) > free(p->sym_val_to_name[i]); > > p->user_val_to_struct = (user_datum_t **) > - malloc(p->p_users.nprim * sizeof(user_datum_t *)); > + calloc(p->p_users.nprim, sizeof(user_datum_t *)); > if (!p->user_val_to_struct) > return -1; > > p->sym_val_to_name[i] = (char **) > - malloc(p->symtab[i].nprim * sizeof(char *)); > + calloc(p->symtab[i].nprim, sizeof(char *)); > if (!p->sym_val_to_name[i]) > return -1; > > diff --git a/libsepol/src/users.c b/libsepol/src/users.c > index ce54c2b..3ffb166 100644 > --- a/libsepol/src/users.c > +++ b/libsepol/src/users.c > @@ -19,12 +19,17 @@ static int user_to_record(sepol_handle_t * handle, > > const char *name = policydb->p_user_val_to_name[user_idx]; > user_datum_t *usrdatum = policydb->user_val_to_struct[user_idx]; > - ebitmap_t *roles = &(usrdatum->roles.roles); > + ebitmap_t *roles; > ebitmap_node_t *rnode; > unsigned bit; > > sepol_user_t *tmp_record = NULL; > > + if (!usrdatum) > + goto err; > + > + roles = &(usrdatum->roles.roles); > + > if (sepol_user_create(handle, &tmp_record) < 0) > goto err; > > @@ -234,6 +239,7 @@ int sepol_user_modify(sepol_handle_t * handle, > if (!tmp_ptr) > goto omem; > policydb->user_val_to_struct = tmp_ptr; > + policydb->user_val_to_struct[policydb->p_users.nprim] = NULL; > > tmp_ptr = realloc(policydb->sym_val_to_name[SYM_USERS], > (policydb->p_users.nprim + > @@ -241,6 +247,7 @@ int sepol_user_modify(sepol_handle_t * handle, > if (!tmp_ptr) > goto omem; > policydb->sym_val_to_name[SYM_USERS] = tmp_ptr; > + policydb->p_user_val_to_name[policydb->p_users.nprim] = NULL; This one is wrong. > > /* Need to copy the user name */ > name = strdup(cname); > _______________________________________________ Selinux mailing list Selinux@xxxxxxxxxxxxx To unsubscribe, send email to Selinux-leave@xxxxxxxxxxxxx. To get help, send an email containing "help" to Selinux-request@xxxxxxxxxxxxx.
